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T. P. HAMMER & J. F. NETTLETON.

METALLIC CAN. No. 305,805. Patented Sept. 16, 1884.

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PETERS. Pholo-Lllhographcn Washmgton. 0.4.

lJNrT n STATES Parent Orrrce.

THORVALD F. HAMMER AND JOSEPH F. NETTLETON, OF BRANFORD, CONN.; SATDNETTLETON 'ASSIGNOR TO EMIL O. HAMMER, OF BOSTON, MASS.

METALLIC CAN.

SPECIFICATION forming part of Letters Patent No. 305,305, datedSeptember 16, 1884.

Application filed March 18. 1884. (No model.)

To aZZ whom it may concern.- Be it known that we, Tl-IORVALD F. HAM- MERand JosEPH F. NETTLETON, both of Bran ford, New Haven county.Connecticut, have invented certain new and useful 1mprovementsiii-Metallic Cans, of which the following is a specification.

This invention relates more particularly to cans for lubricating-oil,and to that class of to which the body is made of malleable or castmetal in which the flexible or spring bottom of sheet metal is soldered.

The object of our in'iprovement is to so affix the spring-bottom in thebase of the body as 1 5 to firmly engage the edge of the spring-bottomwith the metal of the sides of the body without relying solely on theadhesion of the solder, as heretofore, and in which the joint of thebottom with the sides, when soldered, shall be protected from contactsor collisions which tend to crack or injure the soldering in seating orplacing the can on its base.

To these ends my invention may be briefly stated to consist in forming acircumferential groove in the base or end of the body adja cent to theseating edge thereof, and forming the spring-bottom with an elasticdown-turned or flanged edge, which is forced into the grooved body andthe flange sprung into the said groove and there soldered, whereby thejoint is not only made very secure and durable, butthe manufactureisrendered very cheap and perfect, as hereinafter fully set forth.

In the drawings, Figure 1 presents a sec- 3 5 tional elevation of ourimproved can, and

Fig. 2 an inverted plan thereof. Fig. 3 is an enlarged fragmentarysection illustrating more fully the form of the joint between the bodyand bottom, and Fig. 4 is a similar view showo ing a modification.

Referring'to Fig, 1, (4 indicates the body of the oil-can; b, thespring-bottom thereof, and

c the nozzle which screws into the body as usual. The nozzle and thebody are preferably made of malleable cast-iron, as usual in cans ofthis class; but this is not essential to our improvement, as the body ofthe can may also be made of thick sheet metal, if desired.

In the base of the body and near the lower or seating edge thereof isformed an internal circumferential groove, d, in which the edge of thespringbottom b is socketed, as shown, so that the edge of the bottomseats firmly on the shoulder formed by the outerside of the groove inthe metal of the body, as fully illustrated 5 5 in Fig. 1, and alsoby'dotted lines in Fig. 2, the joint of the two being subsequentlysoldered to render the same oil-tight, as will be understood. Thespring-bottom b is preferably so stamped as to have a groove or channel,6, around its circumference surrounding the bulge of the bottom, leavingthe edge of the bottom cupped or rimmed with a downwardlyprojecting rimor flange, f, which fits into the groove cl, as shown, with the edge ofthe flange seating on the lower side or shoulder of the groove, as fullyshown in Fig. l. The profile of the socket-groove (l, as shown in Fig.1, is preferably made to correspond to the section or profile of therimmed edge of the bottom, as shown, the upper side of the groove beingpreferably rounding and gradually vanishing into the side of thebody,while the lower side of the groove is at an abrupt angle to theside of the can, either a right angle or preferably an acute angle, soas to give the bottom of the groove a dovetailed or undercut form,asbest shownin Fig. 3, so that when the edge of the spring-bottom isengaged therewith it will be held more securely and the possibility ofits springing out prevented. If desired, however, the groove may beformed, as seen in Fig. 4:, with a flat shoulder, and the margin of thebottom may be arranged to seat flatwise thereon, as illustrated. Theform shown in Figs. l, 2 and 3, has, however, great advantages, as therimmed or lipped edge seating edgewise instead of flatwise in the grooverenders the engagement with the groove much more stiff and secure, andalso greatly stiffens the rim of the bottom, so that the flexions ofthebottom in being bulged in or out to eject the oil do not extend tothe joint of the rim in the groove (Z, but these flexions cease at thechannel 6, so that hence the fleXions will have lit tle or no tendencyto spring the lipped rim f out of the groove or crack the soldering ofthe joint, as will be readily comprehended.

In manufacturing theimproved cans the cast bodies a afterbeing annealedor rendered I malleable are first trued by dies or other suitable mcans,and are then fastened in a lathe and the groove (1 turned therein, alterwhich the bottom I; is forced or sprung into the same by suitable diesor tools in the position already described and illustrated, and thejoint is then finally soldered,which completes the construction. It willnow be seen that not only is this method of construction very simple andeconomical, but the joint of the body and bottom is unusually neat andsecure, and will not only require less solder and may be soldered moreeasily, but will also be much stronger than is the case with formerconstructions. It will be further seen that not only is the joint betterable to resist the ilexions of the bottom, as before described, but thejoint and the solder are entirely protected from contacts and collisionsin seating the can on its base. for in this case when the can is laiddown it seats on the solid metal edge of the body, which is left of fullthickness, and no contact is made with the joint of bottom and body atall, which, as will be seen in Fig. 1, is above the seating edge withinthe walls of the body itself, and hence almost impregnable to thecontacts and collisions which act to crack the soldering and loosen thejoint in the old construction where the can seats on the soldered jointitself, which is located directly on the seating-edge of the can wherethe metal of the sides is made of reduced thickness to admit the bottom.It is hence evident from the advantages stated that the presentconstruction, while very simple, is a great improvement over the formerconstruction in all respects, and the merit of the invention will betherefore obvious without further statement. WVe do not of course limitourselves to the formation of the groove (Z by turning, as it may beformed in any other suitable way.

\Ve would also state that we do not of course limit our improvement tosquirt-cans with spring-bottoms, and it will be obvious that in somecases the head as well as the bottom of a can may be inserted in thesides in the manner set forth.

In Figs. 1 and 2,1 indicates a bow-spring of steel placed diametricallywithin the can with its ends bearing on the conical sides of the body,while its center bears upon the middle of the bottom, so as to impart apositive outspringing tendency to the bottom and make up for any loss ofelasticity in the sheet metal during constant use, which feature is,however, common in cans of this class, and is not of course hereclaimed.

Ve disclaim the constructions shown in the Patents Nos. 154,910 and267,471, which are distinct from our improvements.

That we claim is 1. A can having a metallic body with a circumferentialgroove formed in the interior thereof adjacent to its seating-edge, incombination with a bottom of sheet metal formed with a flanged edge of anormal diameter greater than the inside diameter of the canbody belowthe groove, the said flanged bottom being forced inside of the can-bodywith its flange sprung into and seated in said groove and theresoldered, substantially as herein shown and described.

2. A can having an internal circumferential groove near the base or edgeof its body, said groove having a dovetailed or undercut form with aninserted head or bottom having an out-turned flanged edge socketcd insaid dovetailed groove, substantially as set forth.

LEs'rER J. NIcI-IoLs, JosnrH O. SHARKEY.

